mirror of https://github.com/rust-lang/rust
52 lines
1.9 KiB
Plaintext
52 lines
1.9 KiB
Plaintext
error[E0277]: the size for values of type `T` cannot be known at compilation time
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--> $DIR/dst-object-from-unsized-type.rs:8:23
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LL | fn test1<T: ?Sized + Foo>(t: &T) {
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| - this type parameter needs to be `Sized`
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LL | let u: &dyn Foo = t;
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| ^ doesn't have a size known at compile-time
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= note: required for the cast from `&T` to `&dyn Foo`
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help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - fn test1<T: ?Sized + Foo>(t: &T) {
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LL + fn test1<T: Foo>(t: &T) {
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error[E0277]: the size for values of type `T` cannot be known at compilation time
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--> $DIR/dst-object-from-unsized-type.rs:13:23
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LL | fn test2<T: ?Sized + Foo>(t: &T) {
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| - this type parameter needs to be `Sized`
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LL | let v: &dyn Foo = t as &dyn Foo;
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| ^ doesn't have a size known at compile-time
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= note: required for the cast from `&T` to `&dyn Foo`
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help: consider removing the `?Sized` bound to make the type parameter `Sized`
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LL - fn test2<T: ?Sized + Foo>(t: &T) {
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LL + fn test2<T: Foo>(t: &T) {
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error[E0277]: the size for values of type `str` cannot be known at compilation time
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--> $DIR/dst-object-from-unsized-type.rs:18:28
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LL | let _: &[&dyn Foo] = &["hi"];
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| ^^^^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `str`
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= note: required for the cast from `&'static str` to `&dyn Foo`
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error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
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--> $DIR/dst-object-from-unsized-type.rs:23:23
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LL | let _: &dyn Foo = x as &dyn Foo;
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| ^ doesn't have a size known at compile-time
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= help: the trait `Sized` is not implemented for `[u8]`
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= note: required for the cast from `&[u8]` to `&dyn Foo`
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error: aborting due to 4 previous errors
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For more information about this error, try `rustc --explain E0277`.
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